diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6a1596..d8d8c52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release Notes
 
+## 0.4.0 (2017-02-25)
+
+- Improve documentation
+- Upgrade to Foundation 0.2.1
+- Upgrade to Nassau 0.13.0
+
 ## 0.3.1 (2016-06-05)
 
 - Fix handling packet length exceeding buffer capacity in Hotspot ITCH